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java.lang.IllegalArgumentException: mapper [host] cannot be changed from type [string] to [ip] at org.elasticsearch.index.mapper.MappedFieldType.checkTypeName(MappedFieldType.java:238) at org.elasticsearch.index.mapper.MappedFieldType.checkCompatibility(MappedFieldType.java:250) at org.elasticsearch.index.mapper.FieldTypeLookup.checkCompatibility(FieldTypeLookup.java:151) at org.elasticsearch.index.mapper.FieldTypeLookup.copyAndAddAll(FieldTypeLookup.java:115) at org.elasticsearch.index.mapper.MapperService.merge(MapperService.java:381) at org.elasticsearch.index.mapper.MapperService.merge(MapperService.java:320) at org.elasticsearch.cluster.metadata.MetaDataIndexUpgradeService.checkMappingsCompatibility(MetaDataIndexUpgradeService.java:302) at org.elasticsearch.cluster.metadata.MetaDataIndexUpgradeService.upgradeIndexMetaData(MetaDataIndexUpgradeService.java:116) at org.elasticsearch.gateway.GatewayMetaState.pre20Upgrade(GatewayMetaState.java:228) at org.elasticsearch.gateway.GatewayMetaState.<init>(GatewayMetaState.java:87) at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) at java.lang.reflect.Constructor.newInstance(Constructor.java:526)